By The Numbers: Top-Earning Tennis Players

Our ranking of the top-paid tennis stars looks at prize money, appearance fees, endorsements and bonuses in the 12-months leading up to this year's U.S. Open. Most players have clauses in their endorsement contracts, particularly with shoe, clothing and racket makers, that include bonuses based on year-end rankings and for tournaments won. Collectively, the top 10 made $165 million, up 4% from last year. Prize money totaled $38 million for the group, with corporate money kicking in the remaining $127 million.